[haiku-development] Re: Question about |=
- From: Philippe Saint-Pierre <stpere@xxxxxxxxx>
- To: haiku-development@xxxxxxxxxxxxx
- Date: Sat, 11 Aug 2012 17:34:12 -0400
Hi,
> But what will fScanMode show?
>
> int fScanMode |= 2;
>
> Taken from this
>
> fScanMode = 0;
>
> if (fDiscoverable->Value()) {
> fScanMode = 1;
> fVisible->SetEnabled(true);
> } else {
> fVisible->SetValue(false);
> fVisible->SetEnabled(false);
> }
>
> if (fVisible->Value())
> fScanMode |= 2;
Imagine fScanMode is worth 1, in binary that would be 00000001, that
operator is equivalent to fScanMode = fScanMode | 2. Now 2 is
00000010, so the operation will give that fScanMode == 00000011. Is
that answering your question? :) In essence, it is setting the second
bit in 'less significant order' to 1.
--
Philippe
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